“The House has taken the correct first step to repeal Obamacare,” Holcomb said in a statement. “We will continue to work on the replacement that is best for Hoosiers while pursing improvements to our HIP 2.0," he said of the state's Medicaid program.

Some major health-care players in Indiana either didn’t respond Tuesday when asked about the bill or said they’re still reviewing the legislation.

Brian Tabor, executive vice president for the Indiana Hospital Association, said he can’t assess how the proposed changes to the Affordable Care Act would affect Hoosier patients and hospitals until the nonpartisan Congressional Budget Office estimates the bill’s impact on coverage.

“That’s our main focus — how it impacts the number of patients that have access to affordable health coverage,” Tabor said. “We don’t want to see a net loss.”

Other bill information not yet publicly available includes the amount of federal funding Indiana would receive for Medicaid compared to current law. The left-leaning Center on Budget and Policy Priorities estimates the bill would shift $370 billion in Medicaid costs to states over the next 10 years.

Susan Jo Thomas, executive director of the advocacy group Covering Kids & Families of Indiana, is trying to figure out what that might mean for HIP 2.0, Indiana’s Medicaid program.

“We are concerned for everyone on Medicaid, especially our most vulnerable Hoosiers,” she said. “I am particularly worried about how we will finance treatment options for our neighbors who struggle with substance use disorders.”

On the private insurance market, the bill’s proposed changes in subsidies for those not offered coverage through an employer would generally give more help to younger and higher-income people than the ACA did, and less to older and poorer people.

Republicans say they’re trying to shore up the individual insurance market, which Indianapolis-based Anthem has said is “on a slippery slope towards significant deterioration and requires changes to ensure future stability and affordability.”

A spokesman for Anthem, the largest insurer in Indiana and a major player in many other states’ individual insurance markets, deferred to the industry’s trade association for comment on the GOP bill.

A spokeswoman for America’s Health Insurance Plans said the trade group is still reviewing the legislation.

The bill would repeal taxes imposed on insurance plans, drug makers, medical device makers and others through the ACA to pay for expanding insurance coverage.

House committees are scheduled to start voting on the bill Wednesday. The Indiana lawmakers serving on those panels are Republican Reps. Susan Brooks, Larry Bucshon and Jackie Walorski.

“Certainly, some Americans benefited from the (ACA),” Brooks said, “but far more Americans have been failed by it and are demanding relief.”

Conservative groups, however, have criticized the bill for not going far enough in repealing the law. Calling the bill “Obamacare Lite,” conservative lawmakers said Tuesday they will push for changes.

“We are united on repeal but we are divided on replacement,” said Sen. Rand Paul, R-Ky.

Rep. Jim Banks, who represents the state's 3rd Congressional District, said he's bothered by aspects of the bill, including its cost; a delay in repealing the ACA's taxes and the "possible creation of a new entitlement program."

"I will carefully study this legislation and evaluate how these concerns are addressed as this bill moves through the legislative process," Banks said in a statement.

If the bill is changed to satisfy conservatives, Republicans could lose support from more moderate members worried about too many people losing coverage under a full repeal.

After Vice President Mike Pence met with conservative leaders Tuesday, his office put out a statement stressing the bill is the first step in the process.

“We are open to working with members of the House and Senate on ways we can improve the bill,” Pence told MSNBC after the meeting. But he added he believes the GOP plan “is the right framework for replacing Obamacare” and the administration will be making that case to lawmakers and the public.

The bill changes the two main ways the Affordable Care Act expanded coverage to about 20 million Americans, including and more than 300,000 Hoosiers.

The ACA expanded eligibility for Medicaid, paying for nearly all the cost of those newly eligible instead of the approximately two-thirds it covers for the rest of Indiana’s Medicaid program.

The GOP bill would phase out the federal funding for the expansion. States that want to continue adding people making up to 138 percent of the poverty level ($27,725 for a family of three) would have to spend more of their own money.

States would also get a capped amount of money to spend on Medicaid, instead of the current open-ended match on the expenses.

Thomas of Covering Kids & Families in Indiana is worried that funding cuts would prompt Indiana to reduce Medicaid’s reimbursement rates for doctors and other health-care providers.

“That could literally take us back to the dark days when provider reimbursement was so low that we had a hard time getting providers to take Medicaid patients,” she said. “If I have a ticket to the circus, but the circus never comes to down, what good is my ticket?”

Hospitals took federal payment cuts under the ACA with the expectation that they would make that up through the law’s increase in insurance coverage, which would reduce the number of patients without insurance showing up in their emergency rooms. Indiana’s hospitals hadn’t reached the net benefit point, Tabor said, but enrollment in both HIP 2.0 and the private insurance market was continuing to go up.

“It’s that momentum that I don’t want to see stop,” he said. If it is stopped, Tabor said, hospitals need to make sure the cuts are sufficiently reversed.

Coverage purchased through the health insurance exchanges created by the ACA is subsidized for those earning up to 400 percent of poverty ($47,080 for a single person). Those earning up to 250 percent of poverty get additional help paying for other out-of-pocket costs like co-payments and deductibles.

More than 80 percent of the nearly 169,000 Hoosiers with exchange plans at the beginning of 2016 got premium supports and more than 40 percent received additional assistance.

The GOP bill would end the cost-sharing subsidies and no longer adjust the premium credits based on insurance costs. Instead, it would adjust them for age and would also offer them to individuals earning up to $75,000.

In Marion County, for example, a 40-year-old making $40,000 is not eligible for a tax credit under current law, but would get a $3,000 credit under the bill, according to an analysis by the nonpartisan Kaiser Family Foundation. A 60-year-old making $30,000 is eligible for $6,110 in subsidies now but would get $4,000 in help under the GOP bill.

States would have access to federal funding to provide extra help to high-risk individuals or to take other steps to stabilize the individual insurance market.

Timothy Jost, an expert on health law at Washington and Lee University, wrote in an analysis for Health Affairs Blog that some insurers might find the changes sufficient to continue to sell plans. But others may not.

While the bill can’t be fully assessed until the Congressional Budget Office weighs in, Jost said the legislation could result in significant losses in coverage while also adding to the deficit.

Contact Maureen Groppe at mgroppe@gannett.com. Follow her on Twitter: @mgroppe.